/Engine/Source/Runtime/MeshDescription/Public/MeshAttributeArray.h
Obtain a reference to this with GetAttributesRef<TArrayView>(...)
template<typename T, typename [TEnableIf](API\Runtime\Core\Templates\TEnableIf)< [TIsArray](API\Runtime\Core\Templates\TIsArray)< T >::Value, int >::Type> TMeshAttributesArray< typename [TMeshAttributesRegisterType](API\Runtime\MeshDescription\TMeshAttributesRegisterType)< T >::RefType > RegisterAttribute ( const [FName](API\Runtime\Core\UObject\FName) AttributeName, const int32 NumberOfChannels, const typename [TMeshAttributesRegisterType](API\Runtime\MeshDescription\TMeshAttributesRegisterType)< T >::RealAttributeType & Default, const EMeshAttributeFlags Flags )